請解釋這個文件

http://www.state.gov/documents/organization/87531.pdf
第八-九頁, nonimmigrant visa for adopted child.

這裏麵隻有兩種情況被收養的小孩可以有把握地拿到非移民簽證
（1）被居住在國外的美國公民收養，計劃訪問美國但是沒有在美國永久居住的打算
（2）被在美國的非移民父母收養（比如F，J等）可以作為父母簽證的家屬（F-2, J-2）etc.
最後
（3）被居住在美國的美國公民收養的小孩，如果簽證官相信小孩訪問後會離境，可以發B-2；但是：
However, for cases where you are not satisfied that the child will return to their place of residence, a NIV should not be issued to the child. Such an issuance would violate the law, circumvent scrutiny intended to protect the child and adoptive parents, and place the child in an untenable immigration predicament since DHS regulations generally prohibit the approval of an immigrant petition for a child who is in the United States either illegally or in nonimmigrant status.

雖然這個規定沒有說綠卡持有者收養的小孩，但是政策原因應該和以上類似，我並不看好樓主能夠成功地拿到B-2.